CN1233084A - Multi-filar helical antenna and portable radio - Google Patents
Multi-filar helical antenna and portable radio Download PDFInfo
- Publication number
- CN1233084A CN1233084A CN99101388.3A CN99101388A CN1233084A CN 1233084 A CN1233084 A CN 1233084A CN 99101388 A CN99101388 A CN 99101388A CN 1233084 A CN1233084 A CN 1233084A
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- China
- Prior art keywords
- terminals
- terminal
- switch
- circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
Abstract
A multi-filar helical antenna has an antenna radiant section which has n elements which are wound in spiral, and a phase control part which feeds signal to the n elements with a phase delay of 360 DEG/n each in the order of an arrangement of the n elements or a phase lead of 360 DEG/n each in the order of the arrangement of the n elements.
Description
The present invention relates to the helical aerials of multi-thread winding, it is mainly used in such as mobile radio apparatus such as portable phones.
In recent years, obtained develop rapidly such as mobile communications such as portable phones, the result, not only wanting has the portable telephone system that uses ground station, and also wanting has the system that uses satellite.Simultaneously, antenna becomes one of important device of portable telephone terminal.
Below, will an example of above-mentioned conventional quadruple screw shape antenna be described with reference to relevant accompanying drawing.
Fig. 9 is the block diagram that conventional quadruple screw shape antenna is shown.In Fig. 9,201 represent the radiant section of quadruple screw shape antenna, and 202 represent the hybrid circuit of 3dB, and 203 represent the I/O end.Below description is had the operation of the quadruple screw shape antenna of this structure.
When making quadruple screw shape antenna 201 form suitable size and passing through hybrid circuit 202 feeds of 3dB at I/O end 203 places, this antenna presents and has the characteristic radiation diagram of cone beam shown in Figure 10.
Yet, because the directivity of said structure always makes progress, so if this antenna is set to the portable phone that utilizes satellite, because of antenna is folded up between standby period, directivity becomes downwards, thereby can not receive the radio wave from the top.
At this problem of routine techniques, the present invention aims to provide a kind of multi-thread helical aerials, and this antenna not only presents directivity upwards when stretching, and also shows as directivity upwards when folding.
The present invention is intended to a kind of multi-thread helical aerials, and this antenna comprises: the aerial radiation part, and it comprises n the element that twines with spirality; And phase control device, this device is fed to n element to a signal, and the phase place of each element all postpones 360 °/n or 360 °/n of leading according to putting in order of n element.
The present invention also is intended to a kind of multi-thread helical aerials, and this antenna comprises: the aerial radiation part, and it comprises four elements that twine with spirality; Article two, feeder line, they are linked the aerial radiation part and have substantially the same electrical length; The 3dB hybrid circuit that comprises four terminals; And two termination circuit, wherein two terminals that are positioned at a side in four terminals of 3dB hybrid circuit are linked two feeder lines, two terminals that are positioned at opposite side in four terminals of 3dB hybrid circuit are linked a switch, this switch switches the connection status with signal I/O part, two connecting circuits that are used for this switch is linked two terminals of four terminals of 3dB hybrid circuit are linked termination circuit respectively, wherein during any conducting in make signal I/O part and two terminals of 3dB hybrid circuit along with the commutation of switch, come a terminal of not conducting of termination by linking not a termination circuit of Lead-through terminal.
By according to structure of the present invention, can utilize a switch and the directivity that makes antenna upward to and downward direction between switch.Therefore, when antenna is installed to portable radio terminal, the directivity of antenna is always made progress, and stretch still folding irrelevant with antenna.
Fig. 1 is the schematic diagram according to the quadruple screw shape antenna of a preferred embodiment of the present invention;
Fig. 2 is the circuit diagram according to the quadruple screw shape antenna of a preferred embodiment of the present invention;
Fig. 3 is the structure chart according to the quadruple screw shape antenna of this preferred embodiment;
Figure 4 and 5 are to illustrate signal is fed to figure according to the method for the quadruple screw shape antenna of this preferred embodiment;
Fig. 6 is the figure that illustrates according to the radiation diagram of the quadruple screw shape antenna of this preferred embodiment;
Fig. 7 is the circuit diagram according to the phase-control circuit of eight line helical aerials of preferred embodiment of the present invention;
Fig. 8 illustrates to stretch behind the portable satellite formula phone installing to according to the quadruple screw shape antenna of this preferred embodiment and the figure when folding;
Fig. 9 is the block diagram of conventional quadruple screw shape antenna; And
Figure 10 is the figure that the radiation diagram of conventional quadruple screw shape antenna is shown.
Below, will with respect to preferred embodiment the present invention be described with reference to relevant accompanying drawing.
Fig. 1 is that Fig. 2 shows quadruple screw shape antenna particularly according to the schematic circuit diagram of the quadruple screw shape antenna of a preferred embodiment of the present invention.In Fig. 1 and 2,101 represent the radiant section of quadruple screw shape antenna, and 102 represent the 3dB hybrid circuit, and 103 represent a switch, and 104 represent the I/O end, the control end of 105 representation switch 103.
106a and 106b representative when terminal conducting of switch 103 with another circuit of Lead-through terminal not of 50 Ω terminations.107 represent feeder line, and 108,109,111a and 111b represent the I/O end of 3dB hybrid circuit 102, the link of 112a and 112b representation switch 103, the public terminal of 113 representation switch 103.190 represent a circuit, and two terminals are wherein linked two feeder lines 107, and a terminal from these two terminals is told two outputs, and another terminal from these two terminals is told two other output.Four lines of helical aerials are linked four outputs respectively.Signal phase on the branch road departs from 180 degree mutually.
The circuit structure of termination circuit 106a will be described now.121a represents block capacitor, and 122a represents resistor, and 123a represents diode, and 124a and 125a represent control end.Block capacitor 121a is connected between the link 112a of terminal 111a of 3dB hybrid circuit 102 and switch 103.Termination circuit 106a is as described below.
Resistor 122a and diode 123a are connected between control end 124a and the 125a, and control end 124a is connected between the link 112a of block capacitor 121a and switch 103.
106a is identical with termination circuit, and in circuit 106b, block capacitor 121b is connected between the link 112b of the terminal 111b of 3dB hybrid circuit 102 and switch 103, and the series circuit of diode 123b and resistor 122b is linked the link 112b of switch 103.In addition, diode in series 123b and resistor 122b are connected between two control end 124b and the 125b mutually.
Then, with the circuit structure of describing according to the quadruple screw shape antenna of above preferred embodiment.The radiant section 101 of quadruple screw shape antenna is linked two feeder lines 107 (108 with identical electrical length by circuit 100,109), feeder line 107 is linked the terminal 108,109 of 3dB hybrid circuit 102, the terminal 111a of 3dB hybrid circuit 102 links the link 112a of switch 103 by circuit 106a, and the terminal 111b of 3dB hybrid circuit 102 links the link 112b of switch 103 by circuit 106b.In addition, the public terminal 113 of switch 103 is linked I/O end 104.
Fig. 3 illustrates the structure according to the radiant section of the quadruple screw shape antenna of this preferred embodiment.In Fig. 3,131 represent the hollow resin cylinder, and 132 represent the antenna element of metal.Four hardwares are wrapped on the resin cylinder 131 with spirality with the pitch that equates and the interval of equating.For example, with respect to size, coiling diameter is about 0.1 wavelength, and twining pitch is about 0.5 wavelength.In addition, for example polytetrafluoroethylene is used as hollow circular cylinder 131, copper wire is used as antenna element 132.
Now, will be referring to figs. 1 to 5 operations of describing quadruple screw shape antenna with said structure.
At first, referring to figs. 3 to 5 operations of describing quadruple screw shape antenna.
Radiation characteristic curve according to the quadruple screw shape antenna 101 of this preferred embodiment is a cone beam characteristic curve, and its direction changes according to the phase place of feed signal.Consider reference axis as shown in Figure 4, when the phase place of terminal 108 place's feed signals is spent with respect to the phase delay 90 of terminal 109 place's feed signals, direction+7 that directivity solid line in Fig. 6 is represented.Simultaneously, when the phase place of terminal 109 place's feed signals is spent with respect to the phase delay 90 of terminal 108 place's feed signals, direction-z that directivity dotted line in Fig. 6 is represented.So, the phase place of the feed signal by switched terminal 108 and 109, the direction of may command directivity.
Phase place to providing electric current when utilizing 3dB hybrid circuit 102 to switch relevant input realizes this switching.
Now, with the operation of describing according to the circuit of preferred embodiment.
Switch 103 switches to link 112a and 112b and public terminal 113 conductings in response to the control voltage at control end 105 places.For example, when the voltage at control end 105 places is in high level, public terminal 113 and link 112a mutual conduction, and when the voltage at control end 105 places is in low level, public terminal 113 and link 112b mutual conduction.
Now, the voltage of considering control end 105,124b and 125a place is in high level and the voltage at control end 124a and 125b place is in low level situation.In the case, switch 103 makes public terminal 113 and link 112a mutual conduction.For example, in order to launch, the signal of I/O end 104 places input is offered 3dB hybrid circuit 102 by terminal 111a.As a result, as shown in Figure 5, the phase place of terminal 109 places output is with respect to phase lag 90 degree of terminal 108 places output.Therefore, obtain the aerial radiation characteristic curve represented as dotted line among Fig. 6.In addition, owing to end and diode 123b conducting at this stage diode 123a, so the terminal 111b of 3dB hybrid circuit 102 terminates at resistor 122b place.When resistor 122b had 50 Ω, terminal 111b was 50 Ω terminations.
On the contrary, the voltage at control end 105,124b and 125a place is in low level, and the voltage at control end 124a and 125b place is when being in high level, and switch 103 makes public terminal 113 and link 112b mutual conduction.Therefore, by terminal 111b the signal of I/O end 104 places input is offered 3dB hybrid circuit 102.As a result, as shown in Figure 4, the phase place of terminal 108 places output is with respect to 90 of the phase lags of terminal 109 places output.Therefore, obtain the represented aerial radiation characteristic curve of Fig. 6 solid line.Because in this stage diode 123a conducting and diode 123b ends, so the terminal 111a of 3dB hybrid circuit 102 terminates at resistor 122a place.When resistor 122a had 50 Ω, terminal 111a was 50 Ω terminations.
Like this, though the commutation of switch makes the terminal 111a of 3dB hybrid circuit 102 and a terminal among the 111b not transmit signal, so this terminal and termination resistor termination.
As mentioned above, according to this preferred embodiment, switch be arranged on signal is fed to the 3dB hybrid circuit of quadruple screw shape antenna before, therefore, can be between direction+z and direction-z the directivity of switched antenna radiation diagram.In addition, since the terminal that when switching, does not transmit the signal that receives from the 3dB hybrid circuit by termination, so this operation is more stable.
In the mode that collapses the quadruple screw shape antenna 101 according to this preferred embodiment is being installed under the situation of portable satellite formula phone 133 as shown in Figure 8, because the directivity of radiation diagram is switched when antenna 101 stretches and be folding, so antenna always can receive the radio wave from the top.In the case, can place mechanical switch 191 near the strong point of antenna 101 bottom peripheries, thus when steering antenna 101, can control signal from then on switch send to control end 105, and switch 103 correspondingly commutates.
As mentioned above, in the time of before the feed circuit that switch is placed quadruple screw shape antenna, can upward to the directivity of downward direction switched antenna radiation diagram.In addition,, can stretch or fold the directivity of switched antenna radiation diagram according to antenna when installing to portable satellite formula phone according to the quadruple screw shape antenna 101 of this preferred embodiment, with the directivity of antenna radiation pattern is always pointed to upward to.In addition, when switching, because the terminal that does not transmit the signal that receives from the 3dB hybrid circuit is by termination, so operation becomes more stable.
Though above-mentioned preferred embodiment requires to make hollow resin cylinder 131 with polytetrafluoroethylene, this is not restriction.As an alternative, also availablely make cylinder such as other resins such as polypropylene.In addition, though above the description is used as antenna element 132 to copper wire,, still can obtain same effect even hardware is directly printed or electroplated on hollow resin cylinder 131.
The number of the reelable line of the present invention is not limited to four.Also can twine eight lines, in the case, phase-control circuit can be as shown in Figure 7.Especially, an available 3dB hybrid circuit, two 45 degree phase splitter and two switches form phase-control circuit.
Claims (6)
1. multi-thread helical aerials is characterized in that comprising:
The aerial radiation part, it comprises n the element that twines with spirality; And
Phase control device, it is fed to a described n element to signal, and the phase place of each element postpones 360 °/n or 360 °/n of leading according to putting in order of a described n element.
2. multi-thread helical aerials as claimed in claim 1, it is characterized in that being provided with n/2 bar feeder line, every described feeder line comprises two terminals, is used for the signal that output phase differs 1 80 degree, described terminal is linked a described n element, and described feed signal is added to described n/2 root power line.
3. multi-thread helical aerials is characterized in that comprising:
The aerial radiation part, it comprises four elements that twine with spirality;
Article two, feeder line, they are linked described aerial radiation part and have substantially the same wire length;
The 3dB hybrid circuit that comprises four terminals; And
Two termination circuit,
Two terminals that are positioned at a side in described four terminals of wherein said 3dB hybrid circuit are linked described two feeder lines, two terminals that are positioned at opposite side in described four terminals of described 3dB hybrid circuit are linked a switch, described switch switches the connection status with signal I/O part, two connecting circuits that are used for described switch is linked two terminals of four terminals described in the described 3dB hybrid circuit are linked termination circuit respectively, and
During any conducting when make described signal I/O part and two terminals of described 3dB hybrid circuit along with the commutation of described switch in, come the described not Lead-through terminal of termination by linking in the described terminal not Lead-through terminal described termination circuit.
4. multi-thread helical aerials as claimed in claim 3, each that it is characterized in that described two termination circuit comprises at least:
The series circuit of diode and termination resistor; And
Two control ends, they all place two end portion of described series circuit.
5. portable radio terminal is characterized in that comprising:
Described multi-thread helical aerials as claimed in claim 1 or 2; And
Radio device, the helical aerials of described multi-thread winding installs on it in the mode of collapsing,
Wherein said switch commutates according to the state of the helical aerials of described multi-thread winding.
6. portable radio device as claimed in claim 5, it is characterized in that it is equipped with the mechanical switch of the helical aerials bottom that places described multi-thread winding, folding and when partly contacting with described mechanical switch when described antenna, described mechanical switch is switched on or switched off.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP011330/98 | 1998-01-23 | ||
| JP011330/1998 | 1998-01-23 | ||
| JP01133098A JP3892129B2 (en) | 1998-01-23 | 1998-01-23 | Portable radio |
| US09/236,463 US6278415B1 (en) | 1998-01-23 | 1999-01-25 | Multi-filar helical antenna and portable radio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1233084A true CN1233084A (en) | 1999-10-27 |
| CN1131575C CN1131575C (en) | 2003-12-17 |
Family
ID=26346742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99101388.3A Expired - Fee Related CN1131575C (en) | 1998-01-23 | 1999-01-25 | Multi-filar helical antenna and portable radio |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6278415B1 (en) |
| EP (1) | EP0932220A3 (en) |
| JP (1) | JP3892129B2 (en) |
| CN (1) | CN1131575C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3788115B2 (en) * | 1999-07-23 | 2006-06-21 | 松下電器産業株式会社 | Method for manufacturing antenna device |
| GB2354115A (en) | 1999-09-09 | 2001-03-14 | Univ Surrey | Adaptive multifilar antenna |
| GB0015019D0 (en) * | 2000-06-20 | 2000-08-09 | Univ Bradford | Directional antenna |
| US6456257B1 (en) * | 2000-12-21 | 2002-09-24 | Hughes Electronics Corporation | System and method for switching between different antenna patterns to satisfy antenna gain requirements over a desired coverage angle |
| US7173576B2 (en) * | 2004-07-28 | 2007-02-06 | Skycross, Inc. | Handset quadrifilar helical antenna mechanical structures |
| US7245268B2 (en) * | 2004-07-28 | 2007-07-17 | Skycross, Inc. | Quadrifilar helical antenna |
| GB0700276D0 (en) * | 2007-01-08 | 2007-02-14 | Sarantel Ltd | A dielectrically-loaded antenna |
| US8089421B2 (en) * | 2008-01-08 | 2012-01-03 | Sarantel Limited | Dielectrically loaded antenna |
| FR2934088B1 (en) * | 2008-07-18 | 2016-03-11 | Thales Sa | QUADRIFILAR PROPELLER RADIALLY RADIALLY FOLLOWING TWO ORTHOGONAL CIRCULAR POLARIZATIONS |
| US8948702B2 (en) | 2009-06-15 | 2015-02-03 | Agc Automotive Americas R&D, Inc. | Antenna system and method for optimizing an RF signal |
| EP2969616B1 (en) | 2013-03-15 | 2017-12-20 | AGC Automotive Americas R & D, Inc. | Window assembly with a transparent electrically conductive layer |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4011567A (en) * | 1976-01-28 | 1977-03-08 | Rca Corporation | Circularly polarized, broadside firing, multihelical antenna |
| SE443691B (en) * | 1984-07-20 | 1986-03-03 | Ericsson Telefon Ab L M | SENDAR RECEIVER SYSTEM IN A SATELLITE |
| US5594461A (en) * | 1993-09-24 | 1997-01-14 | Rockwell International Corp. | Low loss quadrature matching network for quadrifilar helix antenna |
| US5640689A (en) * | 1995-03-31 | 1997-06-17 | Compaq Computer Corp. | Communications apparatus with antenna switching based on antenna rotation |
| JP3297601B2 (en) * | 1996-04-25 | 2002-07-02 | 京セラ株式会社 | Composite antenna |
| US5706019A (en) * | 1996-06-19 | 1998-01-06 | Motorola, Inc. | Integral antenna assembly for a radio and method of manufacturing |
| US5896113A (en) * | 1996-12-20 | 1999-04-20 | Ericsson Inc. | Quadrifilar helix antenna systems and methods for broadband operation in separate transmit and receive frequency bands |
| US6025816A (en) * | 1996-12-24 | 2000-02-15 | Ericsson Inc. | Antenna system for dual mode satellite/cellular portable phone |
| JP3314654B2 (en) * | 1997-03-14 | 2002-08-12 | 日本電気株式会社 | Helical antenna |
| JP3189735B2 (en) * | 1997-05-08 | 2001-07-16 | 日本電気株式会社 | Helical antenna |
| US6133891A (en) * | 1998-10-13 | 2000-10-17 | The United States Of America As Represented By The Secretary Of The Navy | Quadrifilar helix antenna |
-
1998
- 1998-01-23 JP JP01133098A patent/JP3892129B2/en not_active Expired - Fee Related
-
1999
- 1999-01-21 EP EP99101105A patent/EP0932220A3/en not_active Withdrawn
- 1999-01-25 CN CN99101388.3A patent/CN1131575C/en not_active Expired - Fee Related
- 1999-01-25 US US09/236,463 patent/US6278415B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US6278415B1 (en) | 2001-08-21 |
| EP0932220A3 (en) | 2001-04-25 |
| CN1131575C (en) | 2003-12-17 |
| EP0932220A2 (en) | 1999-07-28 |
| JP3892129B2 (en) | 2007-03-14 |
| JPH11214924A (en) | 1999-08-06 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |